Power-operated hammer.



W. S. PAYNE.

POWER OPERATED HAMMER.

APPLICATION FILED APR. n. 1916.

YWFRLTER S. PAYNE Patented June 5, 1917.

3 SHEETS-SHEET 1.

W. S. PAYNE.

POWER OPERATED HAMMER,

APPLICATlON FILED APR. 17. 1916.

Patented June 5, 1917.

3 SHEETS-SHEET 2- Sumwtoz V WeL-rER 5. PAYNE? W. S. PAYNE.

POWER OPERATED HAMMER. APPLICATION FILED APR. 17. I916.

Patented June 5, 1917.

3 SHEETS-SHEET 3- WHLTER 5. PYNE ran warren s. Payne, or mnoonn. assass ns.

POWER-OPERATED HAMMER.

Specification of letters Patent.

Patented June 5, 191?.

Application filed April 17, 1916. Serial No. 91,773.

To aZZ whom it may concern:

Be it known that I, VVALTER S. PAYNE,

a citizen of the United States, residing at Lincoln, in the county of Lancaster and State of Nebraska, have invented certain new and useful Improvements in Power- Operated Hammers, of which the following is a specification, reference being bad to the accompanying drawings.

and useful improvements in power-operated hammers and has for its primary object to improve the construction and increase the utility of a power-operated hammer ot' the type disclosed in Patent Number 1,158,270, issued to me October 26,1915.

It is one of the principal objects of the present invention to provide simple and positively operating means for actuating the hammer, said operating means includingj a cam capable of easy and quick re moval whereby the same may be readily,

replaced by another cam and the extent of the power stroke of the hammer plunger varied. as may be desired by the operator.

It is another object of my invention to provide an improved mounting for the hammer plunger, whereby friction is reduced to a minimum. means being provided to prevent the hammer becoming airloound and thus obviate retardation of its retractile movement. 7

It is also one of the secondary objects of the invention to provide an improved sectional construction of the casing for the operating parts and for the hammer plunger, whereby access may be readily bad thereto for the purpose of replacing or repairing the mechanism.

It is still another object of my invention to provide in combination with the ham mer, an oscillatable sleeve adapted to carry a chisel point, and. meansopcratively connecting the sleeve to the shaft of the motor, whereby the hammer is operated. And finally, the invention has for its object to produce a power-operated hammer which will be light in weight and can be readily manipulated, strong and durable in construction, and highly reliable and efiicient in practical operation.

Vi i th the above and other objects in view, my invention consists in the novel features of construction, combination and arrange ment of parts to be hereinafter more fully of Fig. 1; This invention relates to certain new described, claimed and illustrated in the accompanying drawing, in which,

Figure 1 is a side elevation, partly in section, showing the hammer plunger in its retracted position;

Fig. 2 1s a transverse section taken on the line 22 of Fig. 1;

Fig. 3 is a section talgen on the line 3-3 Fig. 4c is a fragmentary perspective view of the plunger head of the hammer;

Fig. 5 is a section taken on the line 5-5 oi Fig. l;

Fig. 6 is a front end elevation, the oscillatable sleeve being shown in section;

Fig. 7 is a detail elevation of the cam; and k Fig. 8 is a detail perspective view of one of the casing sections.

Referring in detail to the drawing, 5 designat'es the case for the hammer operating mechanism, with whieh the handle 6 is integrally formed. On its upper side, the case 5 is of semicylindrical form and, upon the same, a case section 7 of semi-circular form in cross-section is adapted to be arranged. 8 designates two relatively long semi-cylindrical case sections which are substantially the counterpart of each other.

The main casing 5 and the casing sections 7 and 8 are formed with laterally projecting lugs 9 to receive suitable fastening screws indicated at 10, whereby the several casing sections may be detachably connected to gether. 11 designates the motor case, the body of which may be integrally formed with one of the hammer case sections 8, and to one end of this body a head section 12 is secured by means of the screws indicated at 13, and to said head. section the case 5 for the operating inechanism'is secured by the screws lei, This head plate is formed with an extension 15 interposed between the opposed ends of the case sections 7 and- 8 for the hammer plunger. The other end of the body 11 of the motor case is closed by a hollow head 16 through which the motor shaft 17 extends. In this hollow head 16 of the case, the motor armatur is arranged. The several elements of the casings or housings for the motor, the hammer plunger, and the operating mechanism for the latter, are preferably formed of aluminum. The casing section 7 and the sections 8 for the hammer plunger are provided casing plate. This plate is formed with an annular raceway 21 adjacent t6 its outer edge, and an internal gear 22 rotates contiguous to said .plate within the case-5 is also provided with a raceway in mating relation to the raceway 21. "These raceways receive the anti-friction hearing balls 23.

Upon the end of the motor shaft 17 extending through an opening in the plate 20,

a pinion 24 1S fixed and meshes with the internal gear 22.. The other face of this gear is rahbeted at its outer edge so as to receive a flange formed upon the plate 25 which is suitably fixed to said gear, or if desired, said plate may be integral with the internal gear. 1

' 26 designates the cam shaft which ex tends through central hub formed on the plate 25 and is mounted at its'ends in suitable bearings )late 25 a metal rln 28 is fixed and to said ring one end of a. cam 29 is secured by means of screws indicated'at 30. The maximum diameter of this cam is approximately equal to the internal diameter of the case 5 and projects into the longitudinally eXtending, semi-circular extension formed upon the case wall within which the hammer plunger to be later referred to, is movably disposed. The cam 29 is in the form of a cylindric plate, and the spiral cam edge of this plate, indicated at 31, extends substantially through the entire length of the easing 5, said cam edge extending from one side of the shaft 26 at the outer end there of and terminating at its other end at a dia metrically opposite point at the inner end of said shaft. At one end of the cam plate, the same is provided with an obliquely inclined longitudinal edge 32 which extends from one end of the cam face 31 to the other end thereof.

The sections of the tubular metal lining 18 are connected by a coupling 33 which is exterior-1y threaded for engagement with the interior threads on the opposed ends of said tube sections. In the bore of this coupling, the plunger rod 34 is slidably engaged. The hammer plunger 35 has threaded connection to one end of the plunger rod 34, and the inner end of this hammer plunger and the opposed end of the coupling are'recessed to receive the ends of a coil spring 36 surrounding the plunger rod of two parts or sections,

. thereof a roller and 27. Upon theface of the 29 mounted upon said The other end of the plunger rod is slightly enlarged and formed with a flat bottom face in opposed: relation to the surface of the cam plate 29. A pin or stud 37 is fixed in this end of the plunger rod, and in one side 38 is suitably mounted for engagement upon the cam edge 31. Above this enlarged end of the plunger rod, antifriction'rollers 39 are suitably mounted in I the semi-circular metal lining 18 of the easing section 7. These rollers serve/as guides to permit of a free sliding movement of the plunger rod with a minimum of friction.

The hammer plunger 35 is provided with a plurality of longitudinally extending ducts 35 which open upon the opposite end of the plunger and permit of the free passage of air from opposite sides of the plunger in its movementin each direction. The tubular shell 01' linin 18 within the casing sections 8, projects for some distance beyond the end of the casing, as clearly shown in Fig. 1 and upon the same an oscillatable sleeve 40 is loosely engaged. Upon the end of the motor shaft 17, projecting through the casing head 16, a disk all is fixed, and to the same one end of a. pitman rod 42 is connected, the other end of said rod being pivotally connected to one side of the sleeve 40, as shown at 43. This sleeve is equi ped with a suitable cutting edge and is of material advantags in certa' operations, such as trimming the heads 0 rivets as they. are swaged or hammered down.

In the operation of the device, the motor being set in operation, rotation is transmit ted to the internal gear 22 and to the cam gear. As shown in Fig. 1 of the drawing, as this cam rotates the edge 31 thereof actin against the roller 38 on the pin or stud 3 moves or draws the hammer plunger inwardly against the action of the spring 36 and places said spring under tension. The roller 38 finally moves off the higher end of the cam 29 and the spring 36 then immediately acts to force the hammer plunger 35 outwardly and deliver a powerful blow upon the rivet or other object over which the hammer is set. The roller 38 travels along the inclined edge 32 of the cam plate to the lower side of its spiral edge 31, and in the continued rotation of the cam the roller will again move along this cam edge to the higher side of the cam and the plunger will be retracted into position to deliver another blow when the plunger rod is again released.

From the foregoing description, taken in connection with the accompanying drawing, the construction, manner of operation and several advantages of the invention" was be readily had thereto for the purpose or" repairing the same, and the cam can also be easily and quickly removed and replaced by-another ,cam of different form, whereby the extent of movement of the hammer plun ger may be varied audits operating movemonts quickened or accelerated, as desired. By the provision of the air ducts or ports in the hammer plunger, the plunger will not be air-bound or cushioned and its action thereby retarded. Undue strain upon the operating parts or the mechanism is thus avoided. By the provision of the rollers 39, frictional contact of the hammer plunger with the walls of the casing is prevented and the rod and plunger also held against rotative movement within the casing. The device as a whole is very simple and durable in its construction, highly reliable and positive in operation, and may be manufactured at relatively small cost.

"While I have shown and described the preferred construction and arrangement of the several elements, it is to be understood that the invention is susceptible of considerable modification therein and I, therefore,

reserve the privilege of adopting all such legitimate changes as -may be airly embodied within the spirit and scope of the invention as claimed. I r 7 1.

Having thus fully described inyfinvem I tion, what I desire to claim and secure by engaged with the cam, structed to move -mer plunger, a rod connected Letters Patent is 1 1. In a power-operated hammer,a recipro catory plunger, a spring urging said plunger in one directiomarotatable cam having its axis of rotation disposed in spaced parallel relation' to-the longitudinal axis of. said plunger, means for rotating said cam, and means connected to the plunger operatively said cam being cons the plunger inone direc tion against the action of said spring and then suddenly release the plunger whereby its movement is reversed under the expansive action of the spring. I i

2. In a power-operated hammer, a hamthereto, a power shaft, a) rotatably mounted disk geared to the power shaft, a cam plate dc,- tachably secured at one end to the periphery of said disk, aspring surrounding said rod and urging the hammerin one direction, and means on said rod cooperatively engaged with the cam, said cam being 'constructed to retract the plunger rod and hammer against'the action of said spring and then suddenly release the plunger rod'whereupon the power stroke of the hammer is delivered under the expansion action of the spring. '3, In a power-operated hammer, a ham.-

mer case, ahammer to reciprocate therein,

a spring sur- H a rod connected to the hammer,

rounding said rod and urging the hammer end of the motor in one direction, anti-friction-"rollers enga'ging one end of the rod and preventing a turning movement of the same, a rotatable cam, means for operating said cam, and a" roller mounted upon one end of the rod and cooperatively engaged with the cam, sa d cam being constructed to move the roller in one direction against the action ,of said spring and then suddenly release the plun-' ger, whereupon the power stroke of. the hammer IsdelWered under the expansion of the spr ng.

4, in a power-operated hammer, a case, a

ati ely engaged with said -gear, a'disk oa'n' ried by the gear, a cam removably mountedfl upon said disk, and means on one end of the 1 structed as to suddenly release the rod and permit of the expansive action of the spring to deliver the power stroke of the hammer.

5. In a power-operated hammer, a casing,-

a plunger hammer mounted to reciprocate in said casing, a iwod connected to the hank mer, a guide in the casing forv said-rodpa rod coiiperatively engaged with said camfilfl whereby the rod is moved in one directlonin the rotation of the cam and said spring placed under tension, said cam being so conspring arranged between said guide and the y hammer and urging said hammerone direction, said hammer being provided-with a. 1 plurality of longitudinally extending air ducts, and operating means for the hammer including a rotatable cam and means on one end of said rod operatively engaged with the cam, said cam being constructed to move the rod and hammer in one direction against the action of said spring and then suddenly release the same to permit of the expansion of the spring and the delivery oi the power blow of the hammer.

, 6. In a'poWer-operated hammer, a motor case, a case for the hammer operating mechanism detachably mounted upon one case and having a handheld integral therewith, a plunger hammer and rod, and a sectional casing therefor detaohably secured pon said first named casgs In a power-operated hammer, a casing, a reclprocatory hammer plunger, operating .means therefor, a motor to actuate said operating means, a sleeve loosely mounted to oscillate-upon one end of said casing and having'cutting teeth on one end, and means operatively connecting one end of'the motor shaft to said sleeve to oscillate the same in the operation of the hammer.

8. In a power-operated hammer, a casing, a reciprocatory hammer plunger, operating means therefor, a motor to actuate said operating means, a sleeve loosely mounted to oscillate upon said end of said casing and having cutting teeth on one end, a crank arm fixed to one end of the motor shaft, and a pitmanrod connection between the crank arm and one side of said sleeve to oscillate the latter in the operation of. the hammer. 9. In a power operatedhammer, a reciprocatory plunger, a spring urging said plunger naaaeez a fiXed guide mounted-in the casing, a rod connected to the hammer movable through said guide, a spring disposed between said guide and the hammer and urging the hammer in one direction, a rotary cammounted at one side of said rod, and means on the rod coacting with the cam whereby the hammer is actuated in the rotation of the cam.

11. In a power operated hammer, a hammer case, a hammer to reciprocate in said case, a rod connected to the hammer, a

spring mounted in the case and urging the hammer in .one dlrection, and rotatable means arranged at one side of said rod and having'its rotative axis disposed in parallel relation'to the longitudinal axis of the rod, said rod being provided with means coactmg with said rotatable means whereby the hammer is actuated.

' In testimony whereof I hereunto affix my signature in the presence of two witnesses.

-WALTER S. PAYNE;

W itnesses:- I

MARGARET L. GATES, Geo. Mi GATES. 

